Sorry but i don't agree with this. Sterile possession is often a result of the badly execution of the positional game, NOT the main target of it! If it's done right the main target is the creation of superiority on the pitch - numerical, positional and qualitative.. And when you have a world class talent and youngsters prepared their whole life for it (The La Masia boys) its so much easier to implement these ideas. That's why Pep is struggling a lot elsewhere.. We struggled with the positional game with Tito because he tried to play it too vertically and direct but he didn't have the knowledge how to do it and Tata Martino had zero knowledge of the positional game at all! Luis Enrique abandoned it in his first season and never came back to it! The whole possession that Barca have nowdays is meaningless and has nothing to do with the positional game. Today's Barca team has NO structure, no creative patterns, nothing.. Enrique is relaying only on the individual talent of MSN..
So all we need is to go back to the positional game and hire a coach who is able to execute it properly on the pitch! Will Xavi be one day that kind of coach? I don't know.